本研究在UN、U3Si2单相裂变气体行为模型基础上,结合UN-U3Si2复合燃料结构特点,对UN-U3Si2复合燃料裂变气体释放行为进行了研究。通过开展数值计算,得到了不同温度、不同燃耗下UN-U3Si2复合燃料裂变气体释放。对数值计算结果进行拟合,得到了UN-U3Si2复合燃料裂变气体释放模型。
Fission gas release behavior of UN-U3Si2 composite fuel was studied based on fission gas behavior model of single phase UN and U3Si2, considering the microstructure characteristic of UN-U3Si2 composite fuel. Fission gas release of UN-U3Si2 under different temperature and burnup were obtained by numerical simulation. Based on the numerical simulation results, a fission gas release model of UN-U3Si2 composite fuel was fitted.